String Quartet No. 2: III. Notturno

Recording identifiers

ISRC

USV291479893

CopyrightID (CopyrightChains transaction hash)

0x758c3e00237c1cc7bb9c423e436944cdae088d31f12f8e53b37e99e1e1c34f56

Copyright registration time

2026-07-30T07:17:16+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T07:28:30Z

Bitcoin block

960220

Canonical record hash

sha256:d11059e7ecdccff2bf6ede7a3bbb9dd7d13e7e2ef06aeb0990802b832aeee732

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
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What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.